Process of preparing varnished surfaces for revarnishing.



UNITED STATES v PATENT rrcs...

CHARLES P. STALEY, OF INDIANAPOLIS, INDIANA.

PROCESS OF PREPARING VARNISHED SURFACES FOR REVARNlSHlNG- SPECIFICATIONforming part of Letters Patent N 0. 673,665, dated May 7, 1901.

Application filed September 22. 1899. Serial No. 731,273. (N0 p eim ns)To lb 10/1/0177 it may concern.-

Be it known that. I, CHARLES P. STALEY, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and useful Improvements in Processes ofPreparing Varnished Surfaces for Revarnishing; and Ido declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which itappertains tomake and use the same.

My invention has for one object to provide a process whereby surfaces offurniture and interior woodwork of buildings and the like that requirerenewal of varnish may be prepared therefor, so as to remove theperished and lusterless varnish which may have accumulated throughrepeated coatings or have becomed stained or cracked through accident orage and prepare the surface and restore the same to its natural stateand to a proper condition to receive the recoating.

A further object is to provide such a proc ess as may be safely employedwithout requiring the services of an expert operator in order to guardagainst injury to the finish of the surface to be recoated.

For the purpose of my invention I employ the ingredients hereinafternamed,with which I mix or combine substances that are capable of forminga carrier and an absorbing base or body for the solution that is todestroy or disintegrate the old coating andthat neutralize and arrestthe action of the destructive agency and restore the surface to itsnatural color and previously-made-smooth state and prevent bleachingthereof.

I have found by careful experiments that the best substances to use withthe ingredients herein stated are cornmeal and dry yellow ocherin thedestructive agency and dry Venetian red in the arresting and restoringagency, the destructive and the arresting agencies or compositions beingmixed and applied separately.

In carrying out my process I employ the following ingredients in orabout the proportions stated: fonnominally one gallon for thedestructive element or agency, three quarts of water, preferably ofmoderate temperature, five ounces (avoirdupois weight) caustic potash,one quart of water, three ounces of cornmeal, one-half ounce of-dryFrench yellow ocher, one gallon hot water, four ounces of oxalic acid,and one-half ounce of dry pigment Venetian red.

The aforesaid ingredients are first mixed in two separate vessels, so asto be capable of being applied separately, but which act together or oneupon the other to attain the designed result. For convenience Idesignate the two parts as Nos. 1 and 2, respectively, which areprepared as follows:

No. 1. To three quarts of water add five ounces of caustic potash, whichis occasionally stirred until thoroughly dissolved. Then to one quart ofwater add three ounces of cornmeal and onehalf ounce of French yellowocher, beating and stirring thoroughly,

' until combinedor mixed. Then allow this to stand for thirty minutes.Then the two solutions are to be put into one vessel and well beaten andmixed together.

No. 2. To one gallon of hot water'add four ounces of oxalic acid andone-half'ounce of dry Venetian-red pigment. Let stand untilthoroughlydissolved, stirring occasionally to elfect a complete mixture.

I do not confine myself to the exact proportions of the ingredientsabove stated, as such proportions may be varied according to quired tobe removed in order to regain a proper surface. When such old coating isexcessive, it is most readily absorbed by'employing an increasedproportion of cornmeal.

In practical use the part No. l is applied to a surface of wood with abristle brush or with a sponge, the solution being of such density as tonot run or flow from the portions where applied. About one yard squareof surface should be coated at a time, leaving it remain from two to tenminutes, depending upon the prior condition of the old varnish to bebroken up and absorbed by the solution. Then remove the mixture with asponge, frequently rinsing the same in water and squeezing it, so as tocleanse it. By this manipulation the old coating is destroyed andremoved; but without further treatment the surface would be Wholly unfitto receive a fresh coat of varnish. The part No. 2-is im- 'mediatelyapplied with a sponge, (but in no case with the one used with No. 1,)rubbing conditions of the old coating of varnish rethe surface well withthe sponge, using only sufficient of the solution to moisten the spongethoroughly. The surface should then dry under normal conditions duringfrom six to eight hours, when it will be in proper con- 'dition toreceive either a filler or varnish, or wax, if it be a floor.

Should the application as above described not cause the removal ofportions of the old coating where it may have been unusually thick, theapplications to such portions may be repeated in exactly the same manneras specified.

This process may be employed upon either wood or metallic surfaces andis most effective where the surface has been finished in its naturalcolor, but may also be employed when paint has been used in coating thesurface and also upon waxed floors.

What I claim, and desire to secure by Let- The process of preparingcoated surfaces for recoating, which process consists in first applyingto the old coating a thick mixture composed of water, caustic potash,cornmeal, and yellow ocher; then removing the mixture and the oldcoatingwith it; then applying to the denuded surfaces a thin mixturecomposed of water, oxalic acid, and Venetianred pigment, and thenallowing the same to dry upon the surfaces.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES P. STALEY.

Witnesses:

WM. H. PAYNE, E. T. S1Lv1Us.

